Mostly adopt the standard OS X document-based UI model on OS X

src/command/recent.cpp

@@ -31,6 +31,7 @@
 
 #include "../include/aegisub/context.h"
 #include "../libresrc/libresrc.h"
+#include "../main.h"
 #include "../options.h"
 #include "../project.h"
 #include "../subs_controller.h"
@@ -75,8 +76,12 @@ struct recent_subtitle_entry : public Command {
 	STR_HELP("Open recent subtitles")
 
 	void operator()(agi::Context *c, int id) {
+#ifdef __APPLE__
+		wxGetApp().NewProjectContext().project->LoadSubtitles(config::mru->GetEntry("Subtitle", id));
+#else
 		if (c->subsController->TryToClose() == wxCANCEL) return;
-		c->project->LoadSubtitles(config::mru->GetEntry("Subtitle", id));
+		c->project->LoadSubtitles();
+#endif
 	}
 };
 

src/command/subtitle.cpp

@@ -38,6 +38,7 @@
 #include "../dialogs.h"
 #include "../include/aegisub/context.h"
 #include "../libresrc/libresrc.h"
+#include "../main.h"
 #include "../options.h"
 #include "../project.h"
 #include "../search_replace_engine.h"
@@ -215,6 +216,22 @@ struct subtitle_insert_before_videotime final : public validate_nonempty_selecti
 	}
 };
 
+bool is_okay_to_close_subtitles(agi::Context *c) {
+#ifdef __APPLE__
+	return true;
+#else
+	return c->subsController->TryToClose() != wxCANCEL;
+#endif
+}
+
+void load_subtitles(agi::Context *c, agi::fs::path const& path, std::string const& encoding="") {
+#ifdef __APPLE__
+	wxGetApp().NewProjectContext().project->LoadSubtitles(path, encoding);
+#else
+	c->project->LoadSubtitles(path, encoding);
+#endif
+}
+
 struct subtitle_new final : public Command {
 	CMD_NAME("subtitle/new")
 	CMD_ICON(new_toolbutton)
@@ -223,8 +240,12 @@ struct subtitle_new final : public Command {
 	STR_HELP("New subtitles")
 
 	void operator()(agi::Context *c) override {
-		if (c->subsController->TryToClose() != wxCANCEL)
+#ifdef __APPLE__
+		wxGetApp().NewProjectContext();
+#else
+		if (is_okay_to_reuse_existing_window(c))
 			c->project->CloseSubtitles();
+#endif
 	}
 };
 
@@ -236,10 +257,11 @@ struct subtitle_open final : public Command {
 	STR_HELP("Open a subtitles file")
 
 	void operator()(agi::Context *c) override {
-		if (c->subsController->TryToClose() == wxCANCEL) return;
+		if (!is_okay_to_close_subtitles(c)) return;
+
 		auto filename = OpenFileSelector(_("Open subtitles file"), "Path/Last/Subtitles", "","", SubtitleFormat::GetWildcards(0), c->parent);
 		if (!filename.empty())
-			c->project->LoadSubtitles(filename);
+			load_subtitles(c, filename);
 	}
 };
 
@@ -250,10 +272,10 @@ struct subtitle_open_autosave final : public Command {
 	STR_HELP("Open a previous version of a file which was autosaved by Aegisub")
 
 	void operator()(agi::Context *c) override {
-		if (c->subsController->TryToClose() == wxCANCEL) return;
+		if (!is_okay_to_close_subtitles(c)) return;
-		auto file = PickAutosaveFile(c->parent);
+		auto filename = PickAutosaveFile(c->parent);
-		if (!file.empty())
+		if (!filename.empty())
-			c->project->LoadSubtitles(file);
+			load_subtitles(c, filename);
 	}
 };
 
@@ -265,7 +287,7 @@ struct subtitle_open_charset final : public Command {
 	STR_HELP("Open a subtitles file with a specific file encoding")
 
 	void operator()(agi::Context *c) override {
-		if (c->subsController->TryToClose() == wxCANCEL) return;
+		if (!is_okay_to_close_subtitles(c)) return;
 
 		auto filename = OpenFileSelector(_("Open subtitles file"), "Path/Last/Subtitles", "","", SubtitleFormat::GetWildcards(0), c->parent);
 		if (filename.empty()) return;
@@ -273,7 +295,7 @@ struct subtitle_open_charset final : public Command {
 		wxString charset = wxGetSingleChoice(_("Choose charset code:"), _("Charset"), agi::charset::GetEncodingsList<wxArrayString>(), c->parent, -1, -1, true, 250, 200);
 		if (charset.empty()) return;
 
-		c->project->LoadSubtitles(filename, from_wx(charset));
+		load_subtitles(c, filename, from_wx(charset));
 	}
 };